Use total active time
Record paid task minutes, unpaid screening, active searching, preparation and resolving payment problems. Do not count time when you simply leave a tab open and do something else. Decide what you consider working time, then use that definition consistently. Availability and paid time are different things.
A worked example
Suppose you earn $20 from four tasks. You spend 40 minutes doing them, 20 minutes on screening and 30 minutes looking for available work. After $1 in fees, cash earnings are $19. Your 90 minutes of active time gives $12.67 per hour before taxes and other expenses. Looking only at the paid tasks would produce $30 per hour before fees, a very different figure.
Separate cash from points
Rewards that have not been redeemed are not money received. Record currency, redemption rules, minimum withdrawal and any expiry condition. A screen showing a balance is not proof of a completed payout. If a task requires a purchase, include the purchase cost and any subscription you need to cancel.
Track a normal week
A best-case task can make a method look better than its ordinary performance. Record several days, including days with no paid work. Keep pending rewards separate from received money. Consider whether the task schedule and privacy requirements are acceptable to you, even if the calculated rate is attractive.
Make a decision with your own alternatives
Use the hourly pay calculator to compare your net cash with total active minutes. You may value flexibility, enjoyment or learning as well as earnings. Those are reasonable personal choices. They do not turn an advertised maximum rate into a typical result.
Sources & verification
Official sources where available. Guides without a source list are original planning or arithmetic, not reports of earnings. No hands-on test is implied.